The 2011 Pitchfork Music Festival will be taking place from July 15-17 at Chicago’s Union Park. While three-day passes have sold out, single-day tickets are still available for the event which is continuing to add performers. Guided By Voices, No Age, Gang Gang Dance, Kurt Vile and The Fresh & Onlys are among the additions. These groups join a line-up that already includes Animal Collective, TV on the Radio, Fleet Foxes, Cut Copy, The Dismemberment Plan and Deerhunter.